<?php

/**
 * Ultimate MySQL Wrapper Class
 *
 * @version 2.5.1
 * @author Jeff L. Williams
 * @link http://www.phpclasses.org/ultimatemysql
 *
 * Contributions from
 *   Frank P. Walentynowicz
 *   Larry Wakeman
 *   Nicola Abbiuso
 *   Douglas Gintz
 *   Emre Erkan
 *   Vincent van Daal
 */
class MySQL {

    // SET THESE VALUES TO MATCH YOUR DATA CONNECTION
    private $db_host = "localhost";  // server name
    private $db_user = "";       // user name
    private $db_pass = "";           // password
    private $db_dbname = "";           // database name
    private $db_charset = "";           // optional character set (i.e. utf8)
    private $db_pcon = false;        // use persistent connection

    // constants for SQLValue function
    const SQLVALUE_BIT = "bit";
    const SQLVALUE_BOOLEAN = "boolean";
    const SQLVALUE_DATE = "date";
    const SQLVALUE_DATETIME = "datetime";
    const SQLVALUE_NUMBER = "number";
    const SQLVALUE_T_F = "t-f";
    const SQLVALUE_TEXT = "text";
    const SQLVALUE_TIME = "time";
    const SQLVALUE_Y_N = "y-n";

    // class-internal variables - do not change
    private $active_row = -1;       // current row
    private $error_desc = "";       // last mysql error string
    private $error_number = 0;        // last mysql error number
    private $in_transaction = false;    // used for transactions
    private $last_insert_id;            // last id of record inserted
    private $last_result;               // last mysql query result
    private $last_sql = "";       // last mysql query
    private $mysql_link = 0;        // mysql link resource
    private $time_diff = 0;        // holds the difference in time
    private $time_start = 0;        // start time for the timer

    /**
     * Determines if an error throws an exception
     *
     * @var boolean Set to true to throw error exceptions
     */
    public $ThrowExceptions = false;

    /**
     * Constructor: Opens the connection to the database
     *
     * @param boolean $connect (Optional) Auto-connect when object is created
     * @param string $database (Optional) Database name
     * @param string $server   (Optional) Host address
     * @param string $username (Optional) User name
     * @param string $password (Optional) Password
     * @param string $charset  (Optional) Character set
     */
    public function __construct($connect = true, $database = null, $server = null, $username = null, $password = null, $charset = null) {

        if ($database !== null)
            $this->db_dbname = $database;
        if ($server !== null)
            $this->db_host = $server;
        if ($username !== null)
            $this->db_user = $username;
        if ($password !== null)
            $this->db_pass = $password;
        if ($charset !== null)
            $this->db_charset = $charset;

        if (strlen($this->db_host) > 0 &&
                strlen($this->db_user) > 0) {
            if ($connect)
                $this->Open();
        }
    }

    /**
     * Destructor: Closes the connection to the database
     *
     */
    public function __destruct() {
        $this->Close();
    }

    /**
     * Automatically does an INSERT or UPDATE depending if an existing record
     * exists in a table
     *
     * @param string $tableName The name of the table
     * @param array $valuesArray An associative array containing the column
     *                            names as keys and values as data. The values
     *                            must be SQL ready (i.e. quotes around
     *                            strings, formatted dates, ect)
     * @param array $whereArray An associative array containing the column
     *                           names as keys and values as data. The values
     *                           must be SQL ready (i.e. quotes around strings,
     *                           formatted dates, ect).
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function AutoInsertUpdate($tableName, $valuesArray, $whereArray) {
        $this->ResetError();
        $this->SelectRows($tableName, $whereArray);
        if (!$this->Error()) {
            if ($this->HasRecords()) {
                return $this->UpdateRows($tableName, $valuesArray, $whereArray);
            } else {
                return $this->InsertRow($tableName, $valuesArray);
            }
        } else {
            return false;
        }
    }

    /**
     * Returns true if the internal pointer is at the beginning of the records
     *
     * @return boolean TRUE if at the first row or FALSE if not
     */
    public function BeginningOfSeek() {
        $this->ResetError();
        if ($this->IsConnected()) {
            if ($this->active_row < 1) {
                return true;
            } else {
                return false;
            }
        } else {
            $this->SetError("No connection");
            return false;
        }
    }

    /**
     * [STATIC] Builds a comma delimited list of columns for use with SQL
     *
     * @param array $valuesArray An array containing the column names.
     * @param boolean $addQuotes (Optional) TRUE to add quotes
     * @param boolean $showAlias (Optional) TRUE to show column alias
     * @return string Returns the SQL column list
     */
    static private function BuildSQLColumnsValue($columns, $addQuotes = true, $showAlias = true) {
        if ($addQuotes) {
            $quote = "`";
        } else {
            $quote = "";
        }
        switch (gettype($columns)) {
            case "array":
                $sql = "";
                foreach ($columns as $key => $value) {
                    // Build the columns
                    if (strlen($sql) == 0) {
                        $sql = self::AddQuote($value);
                    } else {
                        $sql .= ", " . self::AddQuote($value);
                    }
                    if ($showAlias && is_string($key) && (!empty($key))) {
                        $sql .= ' AS "' . $key . '"';
                    }
                }
                return $sql;
                break;
            case "string":
                return $quote . $columns . $quote;
                break;
            default:
                return false;
                break;
        }
    }

    /**
     * [STATIC] Builds a comma delimited list of columns for use with SQL
     *
     * @param array $valuesArray An array containing the column names.
     * @param boolean $addQuotes (Optional) TRUE to add quotes
     * @param boolean $showAlias (Optional) TRUE to show column alias
     * @return string Returns the SQL column list
     */
    static private function BuildSQLColumns($columns, $addQuotes = true, $showAlias = true) {
        if ($addQuotes) {
            $quote = "`";
        } else {
            $quote = "";
        }
        switch (gettype($columns)) {
            case "array":
                $sql = "";
                foreach ($columns as $key => $value) {
                    // Build the columns
                    if (strlen($sql) == 0) {
                        $sql = $quote . $value . $quote;
                    } else {
                        $sql .= ", " . $quote . $value . $quote;
                    }
                    if ($showAlias && is_string($key) && (!empty($key))) {
                        $sql .= ' AS "' . $key . '"';
                    }
                }
                return $sql;
                break;
            case "string":
                return $quote . $columns . $quote;
                break;
            default:
                return false;
                break;
        }
    }

    /**
     * [STATIC] Builds a SQL DELETE statement
     *
     * @param string $tableName The name of the table
     * @param array $whereArray (Optional) An associative array containing the
     *                           column names as keys and values as data. The
     *                           values must be SQL ready (i.e. quotes around
     *                           strings, formatted dates, ect). If not specified
     *                           then all values in the table are deleted.
     * @return string Returns the SQL DELETE statement
     */
    static public function BuildSQLDelete($tableName, $whereArray = null) {
        $sql = "DELETE FROM `" . $tableName . "`";
        if (!is_null($whereArray)) {
            $sql .= self::BuildSQLWhereClause($whereArray);
        }
        return $sql;
    }

    /**
     * [STATIC] Builds a SQL INSERT statement
     *
     * @param string $tableName The name of the table
     * @param array $valuesArray An associative array containing the column
     *                            names as keys and values as data. The values
     *                            must be SQL ready (i.e. quotes around
     *                            strings, formatted dates, ect)
     * @return string Returns a SQL INSERT statement
     */
    static public function BuildSQLInsert($tableName, $valuesArray) {
        $columns = self::BuildSQLColumns(array_keys($valuesArray));
        $values = self::BuildSQLColumnsValue($valuesArray, true, false);
        $sql = "INSERT INTO `" . $tableName .
                "` (" . $columns . ") VALUES (" . $values . ")";
        return $sql;
    }

    /**
     * Builds a simple SQL SELECT statement
     *
     * @param string $tableName The name of the table
     * @param array $whereArray (Optional) An associative array containing the
     *                          column names as keys and values as data. The
     *                          values must be SQL ready (i.e. quotes around
     *                          strings, formatted dates, ect)
     * @param array/string $columns (Optional) The column or list of columns to select
     * @param array/string $sortColumns (Optional) Column or list of columns to sort by
     * @param boolean $sortAscending (Optional) TRUE for ascending; FALSE for descending
     *                               This only works if $sortColumns are specified
     * @param integer/string $limit (Optional) The limit of rows to return
     * @return string Returns a SQL SELECT statement
     */
    static public function BuildSQLSelect($tableName, $whereArray = null, $columns = null, $sortColumns = null, $sortAscending = true, $limit = null) {
        if (!is_null($columns)) {
            $sql = self::BuildSQLColumns($columns);
        } else {
            $sql = "*";
        }
        $sql = "SELECT " . $sql . " FROM `" . $tableName . "`";
        if (is_array($whereArray)) {
            $sql .= self::BuildSQLWhereClause($whereArray);
        }
        if (!is_null($sortColumns)) {
            $sql .= " ORDER BY " .
                    self::BuildSQLColumns($sortColumns, true, false) .
                    " " . ($sortAscending ? "ASC" : "DESC");
        }
        if (!is_null($limit)) {
            $sql .= " LIMIT " . $limit;
        }
        return $sql;
    }

    /**
     * [STATIC] Builds a SQL UPDATE statement
     *
     * @param string $tableName The name of the table
     * @param array $valuesArray An associative array containing the column
     *                            names as keys and values as data. The values
     *                            must be SQL ready (i.e. quotes around
     *                            strings, formatted dates, ect)
     * @param array $whereArray (Optional) An associative array containing the
     *                           column names as keys and values as data. The
     *                           values must be SQL ready (i.e. quotes around
     *                           strings, formatted dates, ect). If not specified
     *                           then all values in the table are updated.
     * @return string Returns a SQL UPDATE statement
     */
    static public function BuildSQLUpdate($tableName, $valuesArray, $whereArray = null) {
        $sql = "";
        foreach ($valuesArray as $key => $value) {
            if (strlen($sql) == 0) {
                $sql = "`" . $key . "` = " . self::AddQuote($value);
            } else {
                $sql .= ", `" . $key . "` = " . self::AddQuote($value);
            }
        }
        $sql = "UPDATE `" . $tableName . "` SET " . $sql;
        if (is_array($whereArray)) {
            $sql .= self::BuildSQLWhereClause($whereArray);
        } else {
            $sql .=" WHERE " . $whereArray;
        }
        return $sql;
    }

    /**
     * [STATIC] Builds a SQL WHERE clause from an array.
     * If a key is specified, the key is used at the field name and the value
     * as a comparison. If a key is not used, the value is used as the clause.
     *
     * @param array $whereArray An associative array containing the column
     *                           names as keys and values as data. The values
     *                           must be SQL ready (i.e. quotes around
     *                           strings, formatted dates, ect)
     * @return string Returns a string containing the SQL WHERE clause
     */
    static public function BuildSQLWhereClause($whereArray) {
        $where = "";
        foreach ($whereArray as $key => $value) {
            if (strlen($where) == 0) {
                if (is_string($key)) {
                    $where = " WHERE `" . $key . "' = " . self::AddQuote($value);
                } else {
                    $where = " WHERE " . $value;
                }
            } else {
                if (is_string($key)) {
                    $where .= " AND '" . $key . "' = " . self::AddQuote($value);
                } else {
                    $where .= " AND " . $value;
                }
            }
        }
        return $where;
    }

    static public function AddQuote($value) {
        if (is_array($value)) {
            foreach ($value as $k => $item) {
                if (get_magic_quotes_gpc()) {
                    $value[$k] = stripslashes($item);
                }
                if (!is_numeric($value)) {
                    $value[$k] = "'" . mysql_real_escape_string($item) . "'";
                } else
                    $value[$k] = "'" . $item . "'";
            }
            return $value;
        }
        else {
            if (get_magic_quotes_gpc()) {
                $value = stripslashes($value);
            }
            if (!is_numeric($value)) {
                $value = "'" . mysql_real_escape_string($value) . "'";
            } else
                $value = "'" . $value . "'";
            return $value;
        }
    }

    /**
     * Close current MySQL connection
     *
     * @return object Returns TRUE on success or FALSE on error
     */
    public function Close() {
        $this->ResetError();
        $this->active_row = -1;
        $success = $this->Release();
        if ($success) {
            $success = @mysql_close($this->mysql_link);
            if (!$success) {
                $this->SetError();
            } else {
                unset($this->last_sql);
                unset($this->last_result);
                unset($this->mysql_link);
            }
        }
        return $success;
    }

    /**
     * Deletes rows in a table based on a WHERE filter
     * (can be just one or many rows based on the filter)
     *
     * @param string $tableName The name of the table
     * @param array $whereArray (Optional) An associative array containing the
     *                          column names as keys and values as data. The
     *                          values must be SQL ready (i.e. quotes around
     *                          strings, formatted dates, ect). If not specified
     *                          then all values in the table are deleted.
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function DeleteRows($tableName, $whereArray = null) {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            $sql = self::BuildSQLDelete($tableName, $whereArray);
            // Execute the UPDATE
            if (!$this->Query($sql)) {
                return false;
            } else {
                return true;
            }
        }
    }

    /**
     * Returns true if the internal pointer is at the end of the records
     *
     * @return boolean TRUE if at the last row or FALSE if not
     */
    public function EndOfSeek() {
        $this->ResetError();
        if ($this->IsConnected()) {
            if ($this->active_row >= ($this->NumRows())) {
                return true;
            } else {
                return false;
            }
        } else {
            $this->SetError("No connection");
            return false;
        }
    }

    /**
     * Returns the last MySQL error as text
     *
     * @return string Error text from last known error
     */
    public function Error() {
        $error = $this->error_desc;
        if (empty($error)) {
            if ($this->error_number <> 0) {
                $error = "Unknown Error (#" . $this->error_number . ")";
            } else {
                $error = false;
            }
        } else {
            if ($this->error_number > 0) {
                $error .= " (#" . $this->error_number . ")";
            }
        }
        return $error;
    }

    /**
     * Returns the last MySQL error as a number
     *
     * @return integer Error number from last known error
     */
    public function ErrorNumber() {
        if (strlen($this->error_desc) > 0) {
            if ($this->error_number <> 0) {
                return $this->error_number;
            } else {
                return -1;
            }
        } else {
            return $this->error_number;
        }
    }

    /**
     * [STATIC] Converts any value of any datatype into boolean (true or false)
     *
     * @param mixed $value Value to analyze for TRUE or FALSE
     * @return boolean Returns TRUE or FALSE
     */
    static public function GetBooleanValue($value) {
        if (gettype($value) == "boolean") {
            if ($value == true) {
                return true;
            } else {
                return false;
            }
        } elseif (is_numeric($value)) {
            if ($value > 0) {
                return true;
            } else {
                return false;
            }
        } else {
            $cleaned = strtoupper(trim($value));

            if ($cleaned == "ON") {
                return true;
            } elseif ($cleaned == "SELECTED" || $cleaned == "CHECKED") {
                return true;
            } elseif ($cleaned == "YES" || $cleaned == "Y") {
                return true;
            } elseif ($cleaned == "TRUE" || $cleaned == "T") {
                return true;
            } else {
                return false;
            }
        }
    }

    /**
     * Returns the comments for fields in a table into an
     * array or NULL if the table has not got any fields
     *
     * @param string $table Table name
     * @return array An array that contains the column comments
     */
    public function GetColumnComments($table) {
        $this->ResetError();
        $records = mysql_query("SHOW FULL COLUMNS FROM " . $table);
        if (!$records) {
            $this->SetError();
            return false;
        } else {
            // Get the column names
            $columnNames = $this->GetColumnNames($table);
            if ($this->Error()) {
                return false;
            } else {
                $index = 0;
                // Fetchs the array to be returned (column 8 is field comment):
                while ($array_data = mysql_fetch_array($records)) {
                    $columns[$index] = $array_data[8];
                    $columns[$columnNames[$index++]] = $array_data[8];
                }
                return $columns;
            }
        }
    }

    /**
     * This function returns the number of columns or returns FALSE on error
     *
     * @param string $table (Optional) If a table name is not specified, the
     *                      column count is returned from the last query
     * @return integer The total count of columns
     */
    public function GetColumnCount($table = "") {
        $this->ResetError();
        if (empty($table)) {
            $result = mysql_num_fields($this->last_result);
            if (!$result)
                $this->SetError();
        } else {
            $records = mysql_query("SELECT * FROM " . $table . " LIMIT 1");
            if (!$records) {
                $this->SetError();
                $result = false;
            } else {
                $result = mysql_num_fields($records);
                $success = @mysql_free_result($records);
                if (!$success) {
                    $this->SetError();
                    $result = false;
                }
            }
        }
        return $result;
    }

    /**
     * This function returns the data type for a specified column. If
     * the column does not exists or no records exist, it returns FALSE
     *
     * @param string $column Column name or number (first column is 0)
     * @param string $table (Optional) If a table name is not specified, the
     *                      last returned records are used
     * @return string MySQL data (field) type
     */
    public function GetColumnDataType($column, $table = "") {
        $this->ResetError();
        if (empty($table)) {
            if ($this->NumRows() > 0) {
                if (is_numeric($column)) {
                    return mysql_field_type($this->last_result, $column);
                } else {
                    return mysql_field_type($this->last_result, $this->GetColumnID($column));
                }
            } else {
                return false;
            }
        } else {
            if (is_numeric($column))
                $column = $this->GetColumnName($column, $table);
            $result = mysql_query("SELECT " . $column . " FROM " . $table . " LIMIT 1");
            if (mysql_num_fields($result) > 0) {
                return mysql_field_type($result, 0);
            } else {
                $this->SetError("The specified column or table does not exist, or no data was returned", -1);
                return false;
            }
        }
    }

    /**
     * This function returns the position of a column
     *
     * @param string $column Column name
     * @param string $table (Optional) If a table name is not specified, the
     *                      last returned records are used.
     * @return integer Column ID
     */
    public function GetColumnID($column, $table = "") {
        $this->ResetError();
        $columnNames = $this->GetColumnNames($table);
        if (!$columnNames) {
            return false;
        } else {
            $index = 0;
            $found = false;
            foreach ($columnNames as $columnName) {
                if ($columnName == $column) {
                    $found = true;
                    break;
                }
                $index++;
            }
            if ($found) {
                return $index;
            } else {
                $this->SetError("Column name not found", -1);
                return false;
            }
        }
    }

    /**
     * This function returns the field length or returns FALSE on error
     *
     * @param string $column Column name
     * @param string $table (Optional) If a table name is not specified, the
     *                      last returned records are used.
     * @return integer Field length
     */
    public function GetColumnLength($column, $table = "") {
        $this->ResetError();
        if (empty($table)) {
            if (is_numeric($column)) {
                $columnID = $column;
            } else {
                $columnID = $this->GetColumnID($column);
            }
            if (!$columnID) {
                return false;
            } else {
                $result = mysql_field_len($this->last_result, $columnID);
                if (!$result) {
                    $this->SetError();
                    return false;
                } else {
                    return $result;
                }
            }
        } else {
            $records = mysql_query("SELECT " . $column . " FROM " . $table . " LIMIT 1");
            if (!$records) {
                $this->SetError();
                return false;
            }
            $result = mysql_field_len($records, 0);
            if (!$result) {
                $this->SetError();
                return false;
            } else {
                return $result;
            }
        }
    }

    /**
     * This function returns the name for a specified column number. If
     * the index does not exists or no records exist, it returns FALSE
     *
     * @param string $columnID Column position (0 is the first column)
     * @param string $table (Optional) If a table name is not specified, the
     *                      last returned records are used.
     * @return integer Field Length
     */
    public function GetColumnName($columnID, $table = "") {
        $this->ResetError();
        if (empty($table)) {
            if ($this->NumRows() > 0) {
                $result = mysql_field_name($this->last_result, $columnID);
                if (!$result)
                    $this->SetError();
            } else {
                $result = false;
            }
        } else {
            $records = mysql_query("SELECT * FROM " . $table . " LIMIT 1");
            if (!$records) {
                $this->SetError();
                $result = false;
            } else {
                if (mysql_num_fields($records) > 0) {
                    $result = mysql_field_name($records, $columnID);
                    if (!$result)
                        $this->SetError();
                } else {
                    $result = false;
                }
            }
        }
        return $result;
    }

    /**
     * Returns the field names in a table or query in an array
     *
     * @param string $table (Optional) If a table name is not specified, the
     *                      last returned records are used
     * @return array An array that contains the column names
     */
    public function GetColumnNames($table = "") {
        $this->ResetError();
        if (empty($table)) {
            $columnCount = mysql_num_fields($this->last_result);
            if (!$columnCount) {
                $this->SetError();
                $columns = false;
            } else {
                for ($column = 0; $column < $columnCount; $column++) {
                    $columns[] = mysql_field_name($this->last_result, $column);
                }
            }
        } else {
            $result = mysql_query("SHOW COLUMNS FROM " . $table);
            if (!$result) {
                $this->SetError();
                $columns = false;
            } else {
                while ($array_data = mysql_fetch_array($result)) {
                    $columns[] = $array_data[0];
                }
            }
        }

        // Returns the array
        return $columns;
    }

    /**
     * This function returns the last query as an HTML table
     *
     * @param boolean $showCount (Optional) TRUE if you want to show the row count,
     *                           FALSE if you do not want to show the count
     * @param string $styleTable (Optional) Style information for the table
     * @param string $styleHeader (Optional) Style information for the header row
     * @param string $styleData (Optional) Style information for the cells
     * @return string HTML containing a table with all records listed
     */
    public function GetHTML($result=null, $showCount = true, $styleTable = null, $styleHeader = null, $styleData = null) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        if ($styleTable === null) {
            $tb = "border-collapse:collapse;empty-cells:show";
        } else {
            $tb = $styleTable;
        }
        if ($styleHeader === null) {
            $th = "border-width:1px;border-style:solid;background-color:navy;color:white";
        } else {
            $th = $styleHeader;
        }
        if ($styleData === null) {
            $td = "border-width:1px;border-style:solid";
        } else {
            $td = $styleData;
        }

        if ($this->last_result) {
            if ($this->NumRows() > 0) {
                $html = "";
                if ($showCount)
                    $html = "Record Count: " . $this->NumRows() . "<br />\n";
                $html .= "<table style=\"$tb\" cellpadding=\"2\" cellspacing=\"2\">\n";
                $this->MoveFirst();
                $header = false;
                while ($member = mysql_fetch_object($this->last_result)) {
                    if (!$header) {
                        $html .= "\t<tr>\n";
                        foreach ($member as $key => $value) {
                            $html .= "\t\t<td style=\"$th\"><strong>" . htmlspecialchars($key) . "</strong></td>\n";
                        }
                        $html .= "\t</tr>\n";
                        $header = true;
                    }
                    $html .= "\t<tr>\n";
                    foreach ($member as $key => $value) {
                        $html .= "\t\t<td style=\"$td\">" . htmlspecialchars($value) . "</td>\n";
                    }
                    $html .= "\t</tr>\n";
                }
                $this->MoveFirst();
                $html .= "</table>";
            } else {
                $html = "No records were returned.";
            }
        } else {
            $this->active_row = -1;
            $html = false;
        }
        return $html;
    }

    /**
     * Returns the last query as a JSON document
     *
     * @return string JSON containing all records listed
     */
    public function GetJSON($result=null) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        if ($this->last_result) {
            if ($this->NumRows() > 0) {
                for ($i = 0, $il = mysql_num_fields($this->last_result); $i < $il; $i++) {
                    $types[$i] = mysql_field_type($this->last_result, $i);
                }
                $json = '[';
                $this->MoveFirst();
                while ($member = mysql_fetch_object($this->last_result)) {
                    $json .= json_encode($member) . ",";
                }
                $json .= ']';
                $json = str_replace("},]", "}]", $json);
            } else {
                $json = 'null';
            }
        } else {
            $this->active_row = -1;
            $json = 'null';
        }
        return $json;
    }

    /**
     * Returns the last autonumber ID field from a previous INSERT query
     *
     * @return  integer ID number from previous INSERT query
     */
    public function GetLastInsertID() {
        return $this->last_insert_id;
    }

    /**
     * Returns the last SQL statement executed
     *
     * @return string Current SQL query string
     */
    public function GetLastSQL() {
        return $this->last_sql;
    }

    /**
     * This function returns table names from the database
     * into an array. If the database does not contains
     * any tables, the returned value is FALSE
     *
     * @return array An array that contains the table names
     */
    public function GetTables() {
        $this->ResetError();
        // Query to get the tables in the current database:
        $records = mysql_query("SHOW TABLES");
        if (!$records) {
            $this->SetError();
            return FALSE;
        } else {
            while ($array_data = mysql_fetch_array($records)) {
                $tables[] = $array_data[0];
            }

            // Returns the array or NULL
            if (count($tables) > 0) {
                return $tables;
            } else {
                return FALSE;
            }
        }
    }

    /**
     * Returns the last query as an XML Document
     *
     * @return string XML containing all records listed
     */
    public function GetXML($result=null) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        // Create a new XML document
        $doc = new DomDocument('1.0'); // ,'UTF-8');
        // Create the root node
        $root = $doc->createElement('root');
        $root = $doc->appendChild($root);

        // If there was a result set
        if (is_resource($this->last_result)) {

            // Show the row count and query
            $root->setAttribute('rows', ($this->NumRows() ? $this->NumRows() : 0));
            $root->setAttribute('query', $this->last_sql);
            $root->setAttribute('error', "");

            // process one row at a time
            $rowCount = 0;
            while ($row = mysql_fetch_assoc($this->last_result)) {

                // Keep the row count
                $rowCount = $rowCount + 1;

                // Add node for each row
                $element = $doc->createElement('row');
                $element = $root->appendChild($element);
                $element->setAttribute('index', $rowCount);

                // Add a child node for each field
                foreach ($row as $fieldname => $fieldvalue) {
                    $child = $doc->createElement($fieldname);
                    $child = $element->appendChild($child);

                    // $fieldvalue = iconv("ISO-8859-1", "UTF-8", $fieldvalue);
                    $fieldvalue = htmlspecialchars($fieldvalue);
                    $value = $doc->createTextNode($fieldvalue);
                    $value = $child->appendChild($value);
                } // foreach
            } // while
        } else {
            // Process any errors
            $root->setAttribute('rows', 0);
            $root->setAttribute('query', $this->last_sql);
            if ($this->Error()) {
                $root->setAttribute('error', $this->Error());
            } else {
                $root->setAttribute('error', "No query has been executed.");
            }
        }

        // Show the XML document
        return $doc->saveXML();
    }

    /**
     * Determines if a query contains any rows
     *
     * @param string $sql [Optional] If specified, the query is first executed
     *                    Otherwise, the last query is used for comparison
     * @return boolean TRUE if records exist, FALSE if not or query error
     */
    public function HasRecords($sql = "") {
        if (strlen($sql) > 0) {
            $this->Query($sql);
            if ($this->Error())
                return false;
        }
        if ($this->NumRows() > 0) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Inserts a row into a table in the connected database
     *
     * @param string $tableName The name of the table
     * @param array $valuesArray An associative array containing the column
     *                            names as keys and values as data. The values
     *                            must be SQL ready (i.e. quotes around
     *                            strings, formatted dates, ect)
     * @return integer Returns last insert ID on success or FALSE on failure
     */
    public function InsertRow($tableName, $valuesArray) {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            // Execute the query
            $sql = self::BuildSQLInsert($tableName, $valuesArray);

            if (!$this->Query($sql)) {
                return false;
            } else {
                return $this->GetLastInsertID();
            }
        }
    }

    /**
     * Determines if a valid connection to the database exists
     *
     * @return boolean TRUE idf connectect or FALSE if not connected
     */
    public function IsConnected() {
        if (gettype($this->mysql_link) == "resource") {
            return true;
        } else {
            return false;
        }
    }

    /**
     * [STATIC] Determines if a value of any data type is a date PHP can convert
     *
     * @param date/string $value
     * @return boolean Returns TRUE if value is date or FALSE if not date
     */
    static public function IsDate($value) {
        $date = date('Y', strtotime($value));
        if ($date == "1969" || $date == '') {
            return false;
        } else {
            return true;
        }
    }

    /**
     * Stop executing (die/exit) and show last MySQL error message
     *
     */
    public function Kill($message = "") {
        if (strlen($message) > 0) {
            exit($message);
        } else {
            exit($this->Error());
        }
    }

    /**
     * Seeks to the beginning of the records
     *
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function MoveFirst() {
        $this->ResetError();
        if (!$this->Seek(0)) {
            $this->SetError();
            return false;
        } else {
            $this->active_row = 0;
            return true;
        }
    }

    /**
     * Seeks to the end of the records
     *
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function MoveLast() {
        $this->ResetError();
        $this->active_row = $this->NumRows() - 1;
        if (!$this->Error()) {
            if (!$this->Seek($this->active_row)) {
                return false;
            } else {
                return true;
            }
        } else {
            return false;
        }
    }

    /**
     * Connect to specified MySQL server
     *
     * @param string $database (Optional) Database name
     * @param string $server   (Optional) Host address
     * @param string $username (Optional) User name
     * @param string $password (Optional) Password
     * @param string $charset  (Optional) Character set
     * @param boolean $pcon    (Optional) Persistant connection
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function Open($database = null, $server = null, $username = null, $password = null, $charset = null, $pcon = false) {
        $this->ResetError();

        // Use defaults?
        if ($database !== null)
            $this->db_dbname = $database;
        if ($server !== null)
            $this->db_host = $server;
        if ($username !== null)
            $this->db_user = $username;
        if ($password !== null)
            $this->db_pass = $password;
        if ($charset !== null)
            $this->db_charset = $charset;
        if (is_bool($pcon))
            $this->db_pcon = $pcon;

        $this->active_row = -1;

        // Open persistent or normal connection
        if ($pcon) {
            $this->mysql_link = @mysql_pconnect(
                            $this->db_host, $this->db_user, $this->db_pass);
        } else {
            $this->mysql_link = @mysql_connect(
                            $this->db_host, $this->db_user, $this->db_pass);
        }
        // Connect to mysql server failed?
        if (!$this->IsConnected()) {
            $this->SetError();
            return false;
        } else {
            // Select a database (if specified)
            if (strlen($this->db_dbname) > 0) {
                if (strlen($this->db_charset) == 0) {
                    if (!$this->SelectDatabase($this->db_dbname)) {
                        return false;
                    } else {
                        return true;
                    }
                } else {
                    if (!$this->SelectDatabase(
                                    $this->db_dbname, $this->db_charset)) {
                        return false;
                    } else {
                        return true;
                    }
                }
            } else {
                return true;
            }
        }
    }

    /**
     * Executes the given SQL query and returns the records
     *
     * @param string $sql The query string should not end with a semicolon
     * @return object PHP 'mysql result' resource object containing the records
     *                on SELECT, SHOW, DESCRIBE or EXPLAIN queries and returns;
     *                TRUE or FALSE for all others i.e. UPDATE, DELETE, DROP
     *                AND FALSE on all errors (setting the local Error message)
     */
    public function Query($sql) {
        $this->ResetError();
        $this->last_sql = $sql;
        $this->last_result = @mysql_query($sql, $this->mysql_link);
        if (!$this->last_result) {
            $this->active_row = -1;
            $this->SetError();
            return false;
        } else {
            if (strpos(strtolower($sql), "insert") === 0) {
                $this->last_insert_id = mysql_insert_id();
                if ($this->last_insert_id === false) {
                    $this->SetError();
                    return false;
                } else {
                    $numrows = 0;
                    $this->active_row = -1;
                    return $this->last_result;
                }
            } else if (strpos(strtolower($sql), "select") === 0) {
                $numrows = mysql_NumRows($this->last_result);
                if ($numrows > 0) {
                    $this->active_row = 0;
                } else {
                    $this->active_row = -1;
                }
                $this->last_insert_id = 0;
                return $this->last_result;
            } else {
                return $this->last_result;
            }
        }
    }

    /**
     * Executes the given SQL query and returns a multi-dimensional array
     *
     * @param string $sql The query string should not end with a semicolon
     * @param integer $resultType (Optional) The type of array
     *                Values can be: MYSQL_ASSOC, MYSQL_NUM, MYSQL_BOTH
     * @return array A multi-dimensional array containing all the data
     *               returned from the query or FALSE on all errors
     */
    public function QueryArray($sql, $resultType = MYSQL_BOTH) {
        $this->Query($sql);
        if (!$this->Error()) {
            return $this->RecordsArray($resultType);
        } else {
            return false;
        }
    }

    /**
     * Executes the given SQL query and returns only one (the first) row
     *
     * @param string $sql The query string should not end with a semicolon
     * @return object PHP resource object containing the first row or
     *                FALSE if no row is returned from the query
     */
    public function QuerySingleRow($sql) {
        $result = $this->Query($sql);
        if ($this->NumRows($result) > 0) {
            return $this->Row();
        } else {
            return false;
        }
    }

    /**
     * Executes the given SQL query and returns the first row as an array
     *
     * @param string $sql The query string should not end with a semicolon
     * @param integer $resultType (Optional) The type of array
     *                Values can be: MYSQL_ASSOC, MYSQL_NUM, MYSQL_BOTH
     * @return array An array containing the first row or FALSE if no row
     *               is returned from the query
     */
    public function QueryFirst($sql, $resultType = MYSQL_BOTH) {

        $result = $this->Query($sql);

        if ($this->NumRows($result) > 0) {
            return $this->FetchToArray($result, null, $resultType);
        } else {
            return false;
        }
    }

    /**
     * Executes a query and returns a single value. If more than one row
     * is returned, only the first value in the first column is returned.
     *
     * @param string $sql The query string should not end with a semicolon
     * @return mixed The value returned or FALSE if no value
     */
    public function QuerySingleValue($sql) {
        $result = $this->Query($sql);
        if ($this->NumRows($result) > 0 && $this->GetColumnCount() > 0) {
            $row = $this->FetchToArray(null, MYSQL_NUM);
            return $row[0];
        } else {
            return false;
        }
    }

    /**
     * Executes the given SQL query, measures it, and saves the total duration
     * in microseconds
     *
     * @param string $sql The query string should not end with a semicolon
     * @return object PHP 'mysql result' resource object containing the records
     *                on SELECT, SHOW, DESCRIBE or EXPLAIN queries and returns
     *                TRUE or FALSE for all others i.e. UPDATE, DELETE, DROP
     */
    public function QueryTimed($sql) {
        $this->TimerStart();
        $result = $this->Query($sql);
        $this->TimerStop();
        return $result;
    }

    /**
     * Returns the records from the last query
     *
     * @return object PHP 'mysql result' resource object containing the records
     *                for the last query executed
     */
    public function Records() {
        return $this->last_result;
    }

    /**
     * Returns all records from last query and returns contents as array
     * or FALSE on error
     *
     * @param integer $resultType (Optional) The type of array
     *                Values can be: MYSQL_ASSOC, MYSQL_NUM, MYSQL_BOTH
     * @return Records in array form
     */
    public function RecordsArray($resultType = MYSQL_BOTH) {
        $this->ResetError();
        if ($this->last_result) {
            if (!mysql_data_seek($this->last_result, 0)) {
                $this->SetError();
                return false;
            } else {
                //while($member = mysql_fetch_object($this->last_result)){
                while ($member = mysql_fetch_array($this->last_result, $resultType)) {
                    $members[] = $member;
                }
                mysql_data_seek($this->last_result, 0);
                $this->active_row = 0;
                return $members;
            }
        } else {
            $this->active_row = -1;
            $this->SetError("No query results exist", -1);
            return false;
        }
    }

    /**
     * Frees memory used by the query results and returns the function result
     *
     * @return boolean Returns TRUE on success or FALSE on failure
     */
    public function Release($result=null) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        $this->ResetError();
        if (!$this->last_result) {
            $success = true;
        } else {
            $success = @mysql_free_result($this->last_result);
            if (!$success)
                $this->SetError();
        }
        return $success;
    }

    /**
     * Clears the internal variables from any error information
     *
     */
    private function ResetError() {
        $this->error_desc = '';
        $this->error_number = 0;
    }

    /**
     * Reads the current row and returns contents as a
     * PHP object or returns false on error
     *
     * @param integer $optional_row_number (Optional) Use to specify a row
     * @return object PHP object or FALSE on error
     */
    public function Row($result=null, $optional_row_number = null) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        $this->ResetError();
        if (!$this->last_result) {
            $this->SetError("No query results exist", -1);
            return false;
        } elseif ($optional_row_number === null) {
            if (($this->active_row) > $this->NumRows()) {
                $this->SetError("Cannot read past the end of the records", -1);
                return false;
            } else {
                $this->active_row++;
            }
        } else {
            if ($optional_row_number >= $this->NumRows()) {
                $this->SetError("Row number is greater than the total number of rows", -1);
                return false;
            } else {
                $this->active_row = $optional_row_number;
                $this->Seek($optional_row_number);
            }
        }
        $row = mysql_fetch_object($this->last_result);
        if (!$row) {
            $this->SetError();
            return false;
        } else {
            return $row;
        }
    }

    /**
     * Reads the current row and returns contents as an
     * array or returns false on error
     *
     * @param integer $optional_row_number (Optional) Use to specify a row
     * @param integer $resultType (Optional) The type of array
     *                Values can be: MYSQL_ASSOC, MYSQL_NUM, MYSQL_BOTH
     * @return array Array that corresponds to fetched row or FALSE if no rows
     */
    public function FetchToArray($result=null, $optional_row_number = null, $resultType = MYSQL_BOTH) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        $this->ResetError();
        if (!$this->last_result) {
            $this->SetError("No query results exist", -1);
            return false;
        } elseif ($optional_row_number === null) {
            if (($this->active_row) > $this->NumRows()) {
                $this->SetError("Cannot read past the end of the records", -1);
                return false;
            } else {
                $this->active_row++;
            }
        } else {
            if ($optional_row_number >= $this->NumRows()) {
                $this->SetError("Row number is greater than the total number of rows", -1);
                return false;
            } else {
                $this->active_row = $optional_row_number;
                $this->Seek($optional_row_number);
            }
        }
        $row = mysql_fetch_array($this->last_result, $resultType);
        if (!$row) {
            $this->SetError();
            return false;
        } else {
            return $row;
        }
    }

    /**
     * Returns the last query row count
     *
     * @return integer Row count or FALSE on error
     */
    public function NumRows($result=null) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection", -1);
            return false;
        } elseif (!$this->last_result) {
            $this->SetError("No query results exist", -1);
            return false;
        } else {
            $result = @mysql_NumRows($this->last_result);
            if (!$result) {
                $this->SetError();
                return false;
            } else {
                return $result;
            }
        }
    }

    /**
     * Sets the internal database pointer to the
     * specified row number and returns the result
     *
     * @param integer $row_number Row number
     * @return object Fetched row as PHP object
     */
    public function Seek($result=null, $row_number) {
        if ($result !== null) {
            $this->last_result = $result;
        }
        $this->ResetError();
        $row_count = $this->NumRows();
        if (!$row_count) {
            return false;
        } elseif ($row_number >= $row_count) {
            $this->SetError("Seek parameter is greater than the total number of rows", -1);
            return false;
        } else {
            $this->active_row = $row_number;
            $result = mysql_data_seek($this->last_result, $row_number);
            if (!$result) {
                $this->SetError();
                return false;
            } else {
                $record = mysql_fetch_row($this->last_result);
                if (!$record) {
                    $this->SetError();
                    return false;
                } else {
                    // Go back to the record after grabbing it
                    mysql_data_seek($this->last_result, $row_number);
                    return $record;
                }
            }
        }
    }

    /**
     * Returns the current cursor row location
     *
     * @return integer Current row number
     */
    public function SeekPosition() {
        return $this->active_row;
    }

    /**
     * Selects a different database and character set
     *
     * @param string $database Database name
     * @param string $charset (Optional) Character set (i.e. utf8)
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function SelectDatabase($database, $charset = "") {
        $return_value = true;
        if (!$charset)
            $charset = $this->db_charset;
        $this->ResetError();
        if (!(mysql_select_db($database))) {
            $this->SetError();
            $return_value = false;
        } else {
            if ((strlen($charset) > 0)) {
                if (!(mysql_query("SET CHARACTER SET '{$charset}'", $this->mysql_link))) {
                    $this->SetError();
                    $return_value = false;
                }
            }
        }
        return $return_value;
    }

    /**
     * Gets rows in a table based on a WHERE filter
     *
     * @param string $tableName The name of the table
     * @param array $whereArray (Optional) An associative array containing the
     *                          column names as keys and values as data. The
     *                          values must be SQL ready (i.e. quotes around
     *                          strings, formatted dates, ect)
     * @param array/string $columns (Optional) The column or list of columns to select
     * @param array/string $sortColumns (Optional) Column or list of columns to sort by
     * @param boolean $sortAscending (Optional) TRUE for ascending; FALSE for descending
     *                               This only works if $sortColumns are specified
     * @param integer/string $limit (Optional) The limit of rows to return
     * @return boolean Returns records on success or FALSE on error
     */
    public function SelectRows($tableName, $whereArray = null, $columns = null, $sortColumns = null, $sortAscending = true, $limit = null) {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            $sql = self::BuildSQLSelect($tableName, $whereArray, $columns, $sortColumns, $sortAscending, $limit);
            // Execute the UPDATE
            if (!$this->Query($sql)) {
                return $this->last_result;
            } else {
                return true;
            }
        }
    }

    /**
     * Retrieves all rows in a specified table
     *
     * @param string $tableName The name of the table
     * @return boolean Returns records on success or FALSE on error
     */
    public function SelectTable($tableName) {
        return $this->SelectRows($tableName);
    }

    /**
     * Sets the local variables with the last error information
     *
     * @param string $errorMessage The error description
     * @param integer $errorNumber The error number
     */
    private function SetError($errorMessage = "", $errorNumber = 0) {
        try {
            if (strlen($errorMessage) > 0) {
                $this->error_desc = $errorMessage;
            } else {
                if ($this->IsConnected()) {
                    $this->error_desc = mysql_error($this->mysql_link);
                } else {
                    $this->error_desc = mysql_error();
                }
            }
            if ($errorNumber <> 0) {
                $this->error_number = $errorNumber;
            } else {
                if ($this->IsConnected()) {
                    $this->error_number = @mysql_errno($this->mysql_link);
                } else {
                    $this->error_number = @mysql_errno();
                }
            }
        } catch (Exception $e) {
            $this->error_desc = $e->getMessage();
            $this->error_number = -999;
        }
        if ($this->ThrowExceptions) {
            if (isset($this->error_desc) && $this->error_desc != NULL) {
                throw new Exception($this->error_desc . ' (' . __LINE__ . ')');
            }
        }
    }

    /**
     * [STATIC] Converts a boolean into a formatted TRUE or FALSE value of choice
     *
     * @param mixed $value value to analyze for TRUE or FALSE
     * @param mixed $trueValue value to use if TRUE
     * @param mixed $falseValue value to use if FALSE
     * @param string $datatype Use SQLVALUE constants or the strings:
     *                          string, text, varchar, char, boolean, bool,
     *                          Y-N, T-F, bit, date, datetime, time, integer,
     *                          int, number, double, float
     * @return string SQL formatted value of the specified data type
     */
    static public function SQLBooleanValue($value, $trueValue, $falseValue, $datatype = self::SQLVALUE_TEXT) {
        if (self::GetBooleanValue($value)) {
            $return_value = self::SQLValue($trueValue, $datatype);
        } else {
            $return_value = self::SQLValue($falseValue, $datatype);
        }
        return $return_value;
    }

    /**
     * [STATIC] Returns string suitable for SQL
     *
     * @param string $value
     * @return string SQL formatted value
     */
    static public function SQLFix($value) {
        return @addslashes($value);
    }

    /**
     * [STATIC] Returns MySQL string as normal string
     *
     * @param string $value
     * @return string
     */
    static public function SQLUnfix($value) {
        return @stripslashes($value);
    }

    /**
     * [STATIC] Formats any value into a string suitable for SQL statements
     * (NOTE: Also supports data types returned from the gettype function)
     *
     * @param mixed $value Any value of any type to be formatted to SQL
     * @param string $datatype Use SQLVALUE constants or the strings:
     *                          string, text, varchar, char, boolean, bool,
     *                          Y-N, T-F, bit, date, datetime, time, integer,
     *                          int, number, double, float
     * @return string
     */
    static public function SQLValue($value, $datatype = self::SQLVALUE_TEXT) {
        $return_value = "";

        switch (strtolower(trim($datatype))) {
            case "text":
            case "string":
            case "varchar":
            case "char":
                if (strlen($value) == 0) {
                    $return_value = "NULL";
                } else {
                    if (get_magic_quotes_gpc()) {
                        $value = stripslashes($value);
                    }
                    $return_value = "'" . str_replace("'", "''", $value) . "'";
                }
                break;
            case "number":
            case "integer":
            case "int":
            case "double":
            case "float":
                if (is_numeric($value)) {
                    $return_value = $value;
                } else {
                    $return_value = "NULL";
                }
                break;
            case "boolean":  //boolean to use this with a bit field
            case "bool":
            case "bit":
                if (self::GetBooleanValue($value)) {
                    $return_value = "1";
                } else {
                    $return_value = "0";
                }
                break;
            case "y-n":  //boolean to use this with a char(1) field
                if (self::GetBooleanValue($value)) {
                    $return_value = "'Y'";
                } else {
                    $return_value = "'N'";
                }
                break;
            case "t-f":  //boolean to use this with a char(1) field
                if (self::GetBooleanValue($value)) {
                    $return_value = "'T'";
                } else {
                    $return_value = "'F'";
                }
                break;
            case "date":
                if (self::IsDate($value)) {
                    $return_value = "'" . date('Y-m-d', strtotime($value)) . "'";
                } else {
                    $return_value = "NULL";
                }
                break;
            case "datetime":
                if (self::IsDate($value)) {
                    $return_value = "'" . date('Y-m-d H:i:s', strtotime($value)) . "'";
                } else {
                    $return_value = "NULL";
                }
                break;
            case "time":
                if (self::IsDate($value)) {
                    $return_value = "'" . date('H:i:s', strtotime($value)) . "'";
                } else {
                    $return_value = "NULL";
                }
                break;
            default:
                exit("ERROR: Invalid data type specified in SQLValue method");
        }
        return $return_value;
    }

    /**
     * Returns last measured duration (time between TimerStart and TimerStop)
     *
     * @param integer $decimals (Optional) The number of decimal places to show
     * @return Float Microseconds elapsed
     */
    public function TimerDuration($decimals = 4) {
        return number_format($this->time_diff, $decimals);
    }

    /**
     * Starts time measurement (in microseconds)
     *
     */
    public function TimerStart() {
        $parts = explode(" ", microtime());
        $this->time_diff = 0;
        $this->time_start = $parts[1] . substr($parts[0], 1);
    }

    /**
     * Stops time measurement (in microseconds)
     *
     */
    public function TimerStop() {
        $parts = explode(" ", microtime());
        $time_stop = $parts[1] . substr($parts[0], 1);
        $this->time_diff = ($time_stop - $this->time_start);
        $this->time_start = 0;
    }

    /**
     * Starts a transaction
     *
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function TransactionBegin() {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            if (!$this->in_transaction) {
                if (!mysql_query("START TRANSACTION", $this->mysql_link)) {
                    $this->SetError();
                    return false;
                } else {
                    $this->in_transaction = true;
                    return true;
                }
            } else {
                $this->SetError("Already in transaction", -1);
                return false;
            }
        }
    }

    /**
     * Ends a transaction and commits the queries
     *
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function TransactionEnd() {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            if ($this->in_transaction) {
                if (!mysql_query("COMMIT", $this->mysql_link)) {
                    // $this->TransactionRollback();
                    $this->SetError();
                    return false;
                } else {
                    $this->in_transaction = false;
                    return true;
                }
            } else {
                $this->SetError("Not in a transaction", -1);
                return false;
            }
        }
    }

    /**
     * Rolls the transaction back
     *
     * @return boolean Returns TRUE on success or FALSE on failure
     */
    public function TransactionRollback() {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            if (!mysql_query("ROLLBACK", $this->mysql_link)) {
                $this->SetError("Could not rollback transaction");
                return false;
            } else {
                $this->in_transaction = false;
                return true;
            }
        }
    }

    /**
     * Truncates a table removing all data
     *
     * @param string $tableName The name of the table
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function TruncateTable($tableName) {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            $sql = "TRUNCATE TABLE `" . $tableName . "`";
            if (!$this->Query($sql)) {
                return false;
            } else {
                return true;
            }
        }
    }

    /**
     * Updates rows in a table based on a WHERE filter
     * (can be just one or many rows based on the filter)
     *
     * @param string $tableName The name of the table
     * @param array $valuesArray An associative array containing the column
     *                            names as keys and values as data. The values
     *                            must be SQL ready (i.e. quotes around
     *                            strings, formatted dates, ect)
     * @param array $whereArray (Optional) An associative array containing the
     *                           column names as keys and values as data. The
     *                           values must be SQL ready (i.e. quotes around
     *                           strings, formatted dates, ect). If not specified
     *                           then all values in the table are updated.
     * @return boolean Returns TRUE on success or FALSE on error
     */
    public function UpdateRows($tableName, $valuesArray, $whereArray = null) {
        $this->ResetError();
        if (!$this->IsConnected()) {
            $this->SetError("No connection");
            return false;
        } else {
            $sql = self::BuildSQLUpdate($tableName, $valuesArray, $whereArray);
            // Execute the UPDATE
            if (!$this->Query($sql)) {
                return false;
            } else {
                return true;
            }
        }
    }

}

?>